After watching the video, it sounds like there are problems with votes in several different categories. It also sounds like there are not enough of them to equal the number Cochran won by. A Fed. judge may disqualify the election due to the fact that there are enough irregularities to cast doubt on the integrity of the election process. Additionally, they may do so because it could serve a political purpose of making the Republicans look like slime balls.
No doubt, a good number of Republicans are slime balls.
The judges decide based on the outcome they want, and that might be driven by the candidate they want to run against Childers.